Improvement in nut-locks



titled grafts @met (omite.

Letters Pfl-tent No. 103,220, dated May 17, 1870.

IMPROVEMENT IN MIT-Locks.

The Schedule ,referred to in these Letters Patent and making part of the sam'e.

`To dll'whom 'it may concern: n

-Be it known that we, THOMAS B. McOoxAUennY and J AMES ADAMS, of Newark, in the county of New Castle and State of Delaware,l have invented certain new fand useful Improvements in Nut-Fastening; and

. we do hereby -declare that the following is a full, clear,

and exaot description thereof, reference being had to the accompanying drawings and to the letters'o'treference marked thereon, which form partof this specification.

The nature of our inventionV consists iu the constrution and arrangement of a nut-fastening, as will be hereinafter fully set forth.'

In" order to enable others skilled in the art to which lour invention appertains' to make andus'e the same, we will now proceed. to describe its construction and operation, referring to the annexed 'd rawings, in which- Figure 1 is a longitudinal vertical section of our invention; y

Figure 2 shows the construction of the washer; and jl n Figure 3 is a bottom view of thenut. Mrepresents thetimber through which the bolt B passes.

Gjis the washer placed ou the bolt B, said washer being on its underside provided with one or more projeetions `or flanges au, which are placedin indenta tions on the timber A, so Vas -to prevent thewasher fromltu'rning on the'bolt.

Inthe upper side of the washer are one or more grooves b, radiating from the center, which groove or grooves are wider at theirinner-ends than at the outer ends.

with similar grooves e e, also wider at theirinnereuds than at lthe outer, said grooves forming, with the grooves b in the washer, when the nut is screwed tightly down, a key-seat for the insertion of a spring key, d.

The key-seat thus formed, heilig wider or larger 1n the inside than it is on the outside, allows the spring key to spread or expand,'preventing it from gettingout of place by jarring, thus prevent-ing the nuit. from coming loose.

The spring key d can very'easily be pulled out when desired to take the nut oi.

Havingtllus fully described our invention,

What wel claim as new, and desire to secure by Letters Patent, is-

lhe-combinatiou of the bolt B, washer G, nut 1),.

projectiousa, key-seat b c, and spring key r1, all substantially as and for the purposes herein set forth.

.1n testimony that we claim the foregoing as our own, we affix our signatures in presence Iof two. wit- Witnesses:

JAS. H. RAY,

EDWARD WILSON;

D is the'nut, which is, ou v its initier side, provided l 

